./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/basename-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/basename-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:41:40,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:41:40,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:41:40,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:41:40,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:41:40,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:41:40,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:41:40,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:41:40,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:41:40,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:41:40,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:41:40,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:41:40,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:41:40,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:41:40,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:41:40,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:41:40,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:41:40,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:41:40,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:41:40,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:41:40,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:41:40,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:41:40,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:41:40,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:41:40,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:41:40,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:41:40,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:41:40,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:41:40,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:41:40,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:41:40,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:41:40,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:41:40,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:41:40,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:41:40,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:41:40,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:41:40,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:41:40,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:41:40,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:41:40,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:41:40,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:41:40,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-22 02:41:40,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:41:40,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:41:40,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:41:40,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:41:40,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:41:40,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:41:40,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:41:40,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:41:40,660 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:41:40,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:41:40,661 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:41:40,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:41:40,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:41:40,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:41:40,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:41:40,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:41:40,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:41:40,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:41:40,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:41:40,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:41:40,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 02:41:40,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 02:41:40,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:41:40,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 [2021-12-22 02:41:40,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:41:40,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:41:40,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:41:40,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:41:40,922 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:41:40,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-22 02:41:40,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31800bfc0/39a4978d80b2444abe030283fc585b30/FLAGb5592a2b3 [2021-12-22 02:41:41,517 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:41:41,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-22 02:41:41,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31800bfc0/39a4978d80b2444abe030283fc585b30/FLAGb5592a2b3 [2021-12-22 02:41:41,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31800bfc0/39a4978d80b2444abe030283fc585b30 [2021-12-22 02:41:41,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:41:41,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:41:41,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:41:41,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:41:41,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:41:41,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:41:41" (1/1) ... [2021-12-22 02:41:41,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49fcc6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:41, skipping insertion in model container [2021-12-22 02:41:41,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:41:41" (1/1) ... [2021-12-22 02:41:41,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:41:41,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:41:42,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-22 02:41:42,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:41:42,378 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-22 02:41:42,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2160b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:42, skipping insertion in model container [2021-12-22 02:41:42,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:41:42,379 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 02:41:42,381 INFO L158 Benchmark]: Toolchain (without parser) took 588.65ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 81.4MB in the end (delta: 205.1kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 02:41:42,381 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 02:41:42,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 585.84ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 81.4MB in the end (delta: -107.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 02:41:42,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory is still 38.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 585.84ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 81.4MB in the end (delta: -107.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1515]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/basename-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:41:44,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:41:44,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:41:44,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:41:44,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:41:44,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:41:44,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:41:44,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:41:44,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:41:44,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:41:44,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:41:44,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:41:44,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:41:44,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:41:44,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:41:44,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:41:44,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:41:44,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:41:44,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:41:44,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:41:44,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:41:44,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:41:44,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:41:44,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:41:44,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:41:44,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:41:44,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:41:44,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:41:44,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:41:44,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:41:44,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:41:44,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:41:44,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:41:44,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:41:44,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:41:44,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:41:44,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:41:44,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:41:44,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:41:44,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:41:44,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:41:44,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-22 02:41:44,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:41:44,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:41:44,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:41:44,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:41:44,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:41:44,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:41:44,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:41:44,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:41:44,337 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:41:44,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:41:44,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:41:44,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:41:44,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:41:44,339 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:41:44,339 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:41:44,339 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:41:44,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:41:44,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:41:44,340 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 02:41:44,340 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 02:41:44,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:41:44,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:41:44,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:41:44,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:41:44,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:41:44,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:41:44,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:41:44,341 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 02:41:44,342 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 02:41:44,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:41:44,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 02:41:44,342 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65aca230ed2b7a8b5f7f2ccd484c93b0425fe4f5fb1895001f199a0c2754f5f4 [2021-12-22 02:41:44,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:41:44,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:41:44,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:41:44,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:41:44,717 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:41:44,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-22 02:41:44,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19846b2da/dacbf8a2c8d1408d8f7d9348a1871fc3/FLAG145783ac9 [2021-12-22 02:41:45,358 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:41:45,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i [2021-12-22 02:41:45,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19846b2da/dacbf8a2c8d1408d8f7d9348a1871fc3/FLAG145783ac9 [2021-12-22 02:41:45,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19846b2da/dacbf8a2c8d1408d8f7d9348a1871fc3 [2021-12-22 02:41:45,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:41:45,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:41:45,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:41:45,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:41:45,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:41:45,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:41:45" (1/1) ... [2021-12-22 02:41:45,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7585d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:45, skipping insertion in model container [2021-12-22 02:41:45,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:41:45" (1/1) ... [2021-12-22 02:41:45,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:41:45,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:41:46,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-22 02:41:46,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:41:46,405 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 02:41:46,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:41:46,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-22 02:41:46,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:41:46,536 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 02:41:46,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/basename-1.i[58057,58070] [2021-12-22 02:41:46,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:41:46,679 INFO L208 MainTranslator]: Completed translation [2021-12-22 02:41:46,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46 WrapperNode [2021-12-22 02:41:46,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:41:46,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 02:41:46,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 02:41:46,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 02:41:46,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,768 INFO L137 Inliner]: procedures = 352, calls = 112, calls flagged for inlining = 11, calls inlined = 10, statements flattened = 383 [2021-12-22 02:41:46,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 02:41:46,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 02:41:46,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 02:41:46,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 02:41:46,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 02:41:46,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 02:41:46,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 02:41:46,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 02:41:46,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (1/1) ... [2021-12-22 02:41:46,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:41:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 02:41:46,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 02:41:46,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 02:41:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 02:41:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 02:41:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 02:41:46,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 02:41:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 02:41:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-22 02:41:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 02:41:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 02:41:46,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 02:41:46,942 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-22 02:41:46,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 02:41:46,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 02:41:46,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 02:41:46,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 02:41:47,233 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 02:41:47,234 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 02:41:48,229 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 02:41:48,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 02:41:48,241 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-22 02:41:48,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:41:48 BoogieIcfgContainer [2021-12-22 02:41:48,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 02:41:48,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 02:41:48,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 02:41:48,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 02:41:48,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:41:45" (1/3) ... [2021-12-22 02:41:48,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@332e1b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:41:48, skipping insertion in model container [2021-12-22 02:41:48,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:41:46" (2/3) ... [2021-12-22 02:41:48,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@332e1b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:41:48, skipping insertion in model container [2021-12-22 02:41:48,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:41:48" (3/3) ... [2021-12-22 02:41:48,253 INFO L111 eAbstractionObserver]: Analyzing ICFG basename-1.i [2021-12-22 02:41:48,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 02:41:48,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2021-12-22 02:41:48,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 02:41:48,318 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 02:41:48,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2021-12-22 02:41:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 239 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:41:48,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:48,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:41:48,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-22 02:41:48,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:48,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017268858] [2021-12-22 02:41:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:48,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:48,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 02:41:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:41:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:48,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:41:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:48,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:41:48,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:48,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017268858] [2021-12-22 02:41:48,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017268858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:41:48,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:41:48,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:41:48,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137452722] [2021-12-22 02:41:48,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:41:48,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:41:48,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:41:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:48,678 INFO L87 Difference]: Start difference. First operand has 243 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 239 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:49,183 INFO L93 Difference]: Finished difference Result 251 states and 285 transitions. [2021-12-22 02:41:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:41:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 02:41:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:49,204 INFO L225 Difference]: With dead ends: 251 [2021-12-22 02:41:49,204 INFO L226 Difference]: Without dead ends: 249 [2021-12-22 02:41:49,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:49,210 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 239 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:49,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 207 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 02:41:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-22 02:41:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 233. [2021-12-22 02:41:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.8450704225352113) internal successors, (262), 229 states have internal predecessors, (262), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 266 transitions. [2021-12-22 02:41:49,267 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 266 transitions. Word has length 3 [2021-12-22 02:41:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:49,268 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 266 transitions. [2021-12-22 02:41:49,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 266 transitions. [2021-12-22 02:41:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:41:49,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:49,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:41:49,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 02:41:49,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:49,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:49,477 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-22 02:41:49,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:49,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137886439] [2021-12-22 02:41:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:49,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:49,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:49,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 02:41:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:41:49,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:49,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:41:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:49,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:41:49,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137886439] [2021-12-22 02:41:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137886439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:41:49,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:41:49,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:41:49,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026728845] [2021-12-22 02:41:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:41:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:41:49,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:41:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:49,641 INFO L87 Difference]: Start difference. First operand 233 states and 266 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:50,236 INFO L93 Difference]: Finished difference Result 232 states and 265 transitions. [2021-12-22 02:41:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:41:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 02:41:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:50,239 INFO L225 Difference]: With dead ends: 232 [2021-12-22 02:41:50,239 INFO L226 Difference]: Without dead ends: 232 [2021-12-22 02:41:50,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:50,240 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:50,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 432 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 02:41:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-22 02:41:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-22 02:41:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 142 states have (on average 1.8380281690140845) internal successors, (261), 228 states have internal predecessors, (261), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 265 transitions. [2021-12-22 02:41:50,252 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 265 transitions. Word has length 3 [2021-12-22 02:41:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:50,252 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 265 transitions. [2021-12-22 02:41:50,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 265 transitions. [2021-12-22 02:41:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 02:41:50,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:50,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 02:41:50,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 02:41:50,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:50,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-22 02:41:50,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:50,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948603303] [2021-12-22 02:41:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:50,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:50,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:50,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:50,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 02:41:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:41:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:50,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:41:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:50,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:41:50,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:50,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948603303] [2021-12-22 02:41:50,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948603303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:41:50,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:41:50,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:41:50,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85145669] [2021-12-22 02:41:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:41:50,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:41:50,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:41:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:41:50,647 INFO L87 Difference]: Start difference. First operand 232 states and 265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:51,202 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2021-12-22 02:41:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:41:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 02:41:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:51,204 INFO L225 Difference]: With dead ends: 236 [2021-12-22 02:41:51,204 INFO L226 Difference]: Without dead ends: 236 [2021-12-22 02:41:51,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:41:51,205 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 13 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:51,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 431 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 02:41:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-22 02:41:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-12-22 02:41:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 144 states have (on average 1.8263888888888888) internal successors, (263), 230 states have internal predecessors, (263), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 267 transitions. [2021-12-22 02:41:51,219 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 267 transitions. Word has length 6 [2021-12-22 02:41:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:51,223 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 267 transitions. [2021-12-22 02:41:51,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 267 transitions. [2021-12-22 02:41:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 02:41:51,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:51,226 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:41:51,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-22 02:41:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:51,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-12-22 02:41:51,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:51,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976081012] [2021-12-22 02:41:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:51,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:51,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 02:41:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:51,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:41:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:51,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:41:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:51,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:41:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:52,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:52,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976081012] [2021-12-22 02:41:52,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976081012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:41:52,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:41:52,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-22 02:41:52,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716989280] [2021-12-22 02:41:52,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:41:52,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 02:41:52,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 02:41:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 02:41:52,725 INFO L87 Difference]: Start difference. First operand 234 states and 267 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:55,905 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2021-12-22 02:41:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 02:41:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 02:41:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:55,907 INFO L225 Difference]: With dead ends: 240 [2021-12-22 02:41:55,907 INFO L226 Difference]: Without dead ends: 240 [2021-12-22 02:41:55,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:41:55,908 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 19 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:55,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1120 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 02:41:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-22 02:41:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-22 02:41:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 151 states have (on average 1.781456953642384) internal successors, (269), 236 states have internal predecessors, (269), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 273 transitions. [2021-12-22 02:41:55,917 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 273 transitions. Word has length 10 [2021-12-22 02:41:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:55,917 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 273 transitions. [2021-12-22 02:41:55,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:41:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 273 transitions. [2021-12-22 02:41:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 02:41:55,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:55,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:41:55,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 02:41:56,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:56,119 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash -955562967, now seen corresponding path program 1 times [2021-12-22 02:41:56,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:56,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144864466] [2021-12-22 02:41:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:56,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:56,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:56,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:56,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 02:41:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:41:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:56,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:41:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:56,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144864466] [2021-12-22 02:41:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144864466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:41:56,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:41:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-22 02:41:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722247718] [2021-12-22 02:41:56,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:41:56,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 02:41:56,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 02:41:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:41:56,473 INFO L87 Difference]: Start difference. First operand 240 states and 273 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:41:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:56,664 INFO L93 Difference]: Finished difference Result 260 states and 293 transitions. [2021-12-22 02:41:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 02:41:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-22 02:41:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:56,667 INFO L225 Difference]: With dead ends: 260 [2021-12-22 02:41:56,667 INFO L226 Difference]: Without dead ends: 260 [2021-12-22 02:41:56,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-22 02:41:56,668 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 24 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:56,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1564 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 02:41:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-22 02:41:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-12-22 02:41:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 171 states have (on average 1.6900584795321638) internal successors, (289), 256 states have internal predecessors, (289), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 293 transitions. [2021-12-22 02:41:56,678 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 293 transitions. Word has length 25 [2021-12-22 02:41:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:56,678 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 293 transitions. [2021-12-22 02:41:56,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:41:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 293 transitions. [2021-12-22 02:41:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 02:41:56,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:56,680 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:41:56,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-22 02:41:56,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:56,893 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -167681350, now seen corresponding path program 2 times [2021-12-22 02:41:56,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716238814] [2021-12-22 02:41:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 02:41:56,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:56,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:56,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:56,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 02:41:57,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 02:41:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 02:41:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:41:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:57,166 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 02:41:57,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-22 02:41:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-22 02:41:57,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:41:57,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:57,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716238814] [2021-12-22 02:41:57,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716238814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:41:57,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:41:57,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:41:57,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580469259] [2021-12-22 02:41:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:41:57,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:41:57,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:41:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:57,207 INFO L87 Difference]: Start difference. First operand 260 states and 293 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:41:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:57,597 INFO L93 Difference]: Finished difference Result 271 states and 305 transitions. [2021-12-22 02:41:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:41:57,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 02:41:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:57,599 INFO L225 Difference]: With dead ends: 271 [2021-12-22 02:41:57,599 INFO L226 Difference]: Without dead ends: 271 [2021-12-22 02:41:57,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:41:57,600 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 224 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:57,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 210 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 02:41:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-22 02:41:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 255. [2021-12-22 02:41:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 171 states have (on average 1.6608187134502923) internal successors, (284), 251 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 288 transitions. [2021-12-22 02:41:57,607 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 288 transitions. Word has length 45 [2021-12-22 02:41:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:57,608 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 288 transitions. [2021-12-22 02:41:57,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:41:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 288 transitions. [2021-12-22 02:41:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 02:41:57,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:57,610 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:41:57,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 02:41:57,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:57,822 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -167681349, now seen corresponding path program 1 times [2021-12-22 02:41:57,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:57,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194492917] [2021-12-22 02:41:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:41:57,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:57,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 02:41:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:41:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 02:41:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:41:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:41:58,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194492917] [2021-12-22 02:41:58,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194492917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:41:58,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:41:58,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-22 02:41:58,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214024589] [2021-12-22 02:41:58,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:41:58,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 02:41:58,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 02:41:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-22 02:41:58,482 INFO L87 Difference]: Start difference. First operand 255 states and 288 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:41:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:41:58,892 INFO L93 Difference]: Finished difference Result 263 states and 296 transitions. [2021-12-22 02:41:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 02:41:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-22 02:41:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:41:58,895 INFO L225 Difference]: With dead ends: 263 [2021-12-22 02:41:58,895 INFO L226 Difference]: Without dead ends: 263 [2021-12-22 02:41:58,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-22 02:41:58,896 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 33 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:41:58,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 2862 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 02:41:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-22 02:41:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-22 02:41:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 179 states have (on average 1.6312849162011174) internal successors, (292), 259 states have internal predecessors, (292), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:41:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2021-12-22 02:41:58,904 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 45 [2021-12-22 02:41:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:41:58,906 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2021-12-22 02:41:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:41:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2021-12-22 02:41:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 02:41:58,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:41:58,909 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:41:58,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 02:41:59,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:41:59,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:41:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:41:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1953485173, now seen corresponding path program 2 times [2021-12-22 02:41:59,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:41:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289303100] [2021-12-22 02:41:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 02:41:59,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:41:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:41:59,131 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:41:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 02:41:59,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 02:41:59,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 02:41:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 02:41:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:41:59,420 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 02:41:59,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:41:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:41:59,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:41:59,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:41:59,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289303100] [2021-12-22 02:41:59,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289303100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:41:59,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:41:59,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 02:41:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436038204] [2021-12-22 02:41:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:41:59,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 02:41:59,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:41:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 02:41:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 02:41:59,524 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:01,024 INFO L93 Difference]: Finished difference Result 445 states and 509 transitions. [2021-12-22 02:42:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 02:42:01,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 02:42:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:01,027 INFO L225 Difference]: With dead ends: 445 [2021-12-22 02:42:01,027 INFO L226 Difference]: Without dead ends: 445 [2021-12-22 02:42:01,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:01,028 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 667 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:01,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 722 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 02:42:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-22 02:42:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 369. [2021-12-22 02:42:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 285 states have (on average 1.7228070175438597) internal successors, (491), 364 states have internal predecessors, (491), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 02:42:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 497 transitions. [2021-12-22 02:42:01,038 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 497 transitions. Word has length 53 [2021-12-22 02:42:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 497 transitions. [2021-12-22 02:42:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 497 transitions. [2021-12-22 02:42:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 02:42:01,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:01,039 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:01,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:01,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -530101490, now seen corresponding path program 1 times [2021-12-22 02:42:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:01,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215985397] [2021-12-22 02:42:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:01,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:01,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:01,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 02:42:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 02:42:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:01,796 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 02:42:01,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:42:02,181 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-22 02:42:02,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2021-12-22 02:42:02,201 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:02,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:02,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:02,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215985397] [2021-12-22 02:42:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215985397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:02,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:02,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:02,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983591801] [2021-12-22 02:42:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:02,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:02,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:02,377 INFO L87 Difference]: Start difference. First operand 369 states and 497 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:02,497 INFO L93 Difference]: Finished difference Result 370 states and 498 transitions. [2021-12-22 02:42:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 02:42:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-22 02:42:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:02,499 INFO L225 Difference]: With dead ends: 370 [2021-12-22 02:42:02,499 INFO L226 Difference]: Without dead ends: 370 [2021-12-22 02:42:02,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-22 02:42:02,500 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 5 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:02,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1279 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 220 Unchecked, 0.0s Time] [2021-12-22 02:42:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-22 02:42:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-12-22 02:42:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 286 states have (on average 1.7202797202797202) internal successors, (492), 365 states have internal predecessors, (492), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 02:42:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 498 transitions. [2021-12-22 02:42:02,508 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 498 transitions. Word has length 56 [2021-12-22 02:42:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:02,509 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 498 transitions. [2021-12-22 02:42:02,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 498 transitions. [2021-12-22 02:42:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 02:42:02,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:02,510 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:02,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-22 02:42:02,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:02,726 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 746722395, now seen corresponding path program 1 times [2021-12-22 02:42:02,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:02,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067919383] [2021-12-22 02:42:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:02,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:02,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:02,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:02,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 02:42:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:02,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:42:02,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:03,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:03,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067919383] [2021-12-22 02:42:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067919383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:03,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:42:03,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375898097] [2021-12-22 02:42:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:03,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:42:03,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:42:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:03,061 INFO L87 Difference]: Start difference. First operand 370 states and 498 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:03,461 INFO L93 Difference]: Finished difference Result 387 states and 518 transitions. [2021-12-22 02:42:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:42:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-22 02:42:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:03,463 INFO L225 Difference]: With dead ends: 387 [2021-12-22 02:42:03,463 INFO L226 Difference]: Without dead ends: 387 [2021-12-22 02:42:03,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:03,464 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 394 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:03,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 244 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 02:42:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-22 02:42:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 363. [2021-12-22 02:42:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 286 states have (on average 1.6713286713286712) internal successors, (478), 358 states have internal predecessors, (478), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 02:42:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 484 transitions. [2021-12-22 02:42:03,480 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 484 transitions. Word has length 57 [2021-12-22 02:42:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:03,481 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 484 transitions. [2021-12-22 02:42:03,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 484 transitions. [2021-12-22 02:42:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 02:42:03,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:03,483 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:03,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:03,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:03,691 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 746722396, now seen corresponding path program 1 times [2021-12-22 02:42:03,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:03,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803194306] [2021-12-22 02:42:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:03,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:03,694 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:03,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 02:42:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:42:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:04,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:04,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803194306] [2021-12-22 02:42:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803194306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:04,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:04,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 02:42:04,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674793083] [2021-12-22 02:42:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:04,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 02:42:04,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 02:42:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 02:42:04,110 INFO L87 Difference]: Start difference. First operand 363 states and 484 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:04,331 INFO L93 Difference]: Finished difference Result 279 states and 313 transitions. [2021-12-22 02:42:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 02:42:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-22 02:42:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:04,333 INFO L225 Difference]: With dead ends: 279 [2021-12-22 02:42:04,333 INFO L226 Difference]: Without dead ends: 279 [2021-12-22 02:42:04,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:04,334 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 258 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 924 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-22 02:42:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 257. [2021-12-22 02:42:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 181 states have (on average 1.580110497237569) internal successors, (286), 253 states have internal predecessors, (286), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 290 transitions. [2021-12-22 02:42:04,340 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 290 transitions. Word has length 57 [2021-12-22 02:42:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:04,340 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 290 transitions. [2021-12-22 02:42:04,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 290 transitions. [2021-12-22 02:42:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 02:42:04,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:04,341 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:04,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-22 02:42:04,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:04,547 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1673575759, now seen corresponding path program 1 times [2021-12-22 02:42:04,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398942910] [2021-12-22 02:42:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:04,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:04,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:04,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:04,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 02:42:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:42:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:04,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:04,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398942910] [2021-12-22 02:42:04,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398942910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:04,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:04,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:42:04,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076411981] [2021-12-22 02:42:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:04,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 02:42:04,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 02:42:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:04,955 INFO L87 Difference]: Start difference. First operand 257 states and 290 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:05,673 INFO L93 Difference]: Finished difference Result 275 states and 309 transitions. [2021-12-22 02:42:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:42:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-12-22 02:42:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:05,676 INFO L225 Difference]: With dead ends: 275 [2021-12-22 02:42:05,676 INFO L226 Difference]: Without dead ends: 275 [2021-12-22 02:42:05,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:05,677 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 254 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:05,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 624 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 02:42:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-22 02:42:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2021-12-22 02:42:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 193 states have (on average 1.5751295336787565) internal successors, (304), 264 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 308 transitions. [2021-12-22 02:42:05,689 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 308 transitions. Word has length 58 [2021-12-22 02:42:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:05,689 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 308 transitions. [2021-12-22 02:42:05,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 308 transitions. [2021-12-22 02:42:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 02:42:05,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:05,690 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:05,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-22 02:42:05,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:05,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:05,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 341240963, now seen corresponding path program 1 times [2021-12-22 02:42:05,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945464435] [2021-12-22 02:42:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:05,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:05,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:05,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 02:42:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 02:42:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:06,448 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 02:42:06,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 02:42:06,469 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 02:42:06,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 02:42:06,709 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 02:42:06,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-22 02:42:06,766 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:06,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:07,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:07,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945464435] [2021-12-22 02:42:07,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945464435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:07,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:07,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:07,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602718994] [2021-12-22 02:42:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:07,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:07,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:07,004 INFO L87 Difference]: Start difference. First operand 268 states and 308 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:07,165 INFO L93 Difference]: Finished difference Result 268 states and 307 transitions. [2021-12-22 02:42:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 02:42:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-22 02:42:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:07,167 INFO L225 Difference]: With dead ends: 268 [2021-12-22 02:42:07,167 INFO L226 Difference]: Without dead ends: 268 [2021-12-22 02:42:07,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 02:42:07,168 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 4 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:07,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1353 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 329 Unchecked, 0.0s Time] [2021-12-22 02:42:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-22 02:42:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-12-22 02:42:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 193 states have (on average 1.5699481865284974) internal successors, (303), 264 states have internal predecessors, (303), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 307 transitions. [2021-12-22 02:42:07,173 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 307 transitions. Word has length 59 [2021-12-22 02:42:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:07,173 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 307 transitions. [2021-12-22 02:42:07,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 307 transitions. [2021-12-22 02:42:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 02:42:07,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:07,174 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:07,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:07,391 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash 341240962, now seen corresponding path program 1 times [2021-12-22 02:42:07,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:07,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514108890] [2021-12-22 02:42:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:07,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:07,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 02:42:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:42:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:07,864 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 02:42:07,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 02:42:07,913 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 02:42:07,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-22 02:42:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:07,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:07,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514108890] [2021-12-22 02:42:07,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514108890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:07,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:07,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:42:07,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2679306] [2021-12-22 02:42:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:07,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:42:07,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:42:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:07,939 INFO L87 Difference]: Start difference. First operand 268 states and 307 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:08,399 INFO L93 Difference]: Finished difference Result 275 states and 314 transitions. [2021-12-22 02:42:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:42:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-22 02:42:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:08,401 INFO L225 Difference]: With dead ends: 275 [2021-12-22 02:42:08,401 INFO L226 Difference]: Without dead ends: 275 [2021-12-22 02:42:08,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:08,402 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 210 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:08,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 354 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 02:42:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-22 02:42:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2021-12-22 02:42:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 198 states have (on average 1.5656565656565657) internal successors, (310), 268 states have internal predecessors, (310), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 314 transitions. [2021-12-22 02:42:08,407 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 314 transitions. Word has length 59 [2021-12-22 02:42:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:08,407 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 314 transitions. [2021-12-22 02:42:08,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 314 transitions. [2021-12-22 02:42:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 02:42:08,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:08,408 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:08,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:08,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:08,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -278071788, now seen corresponding path program 1 times [2021-12-22 02:42:08,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:08,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175921797] [2021-12-22 02:42:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:08,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:08,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:08,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 02:42:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 02:42:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:09,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:09,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:09,417 INFO L353 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-22 02:42:09,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-12-22 02:42:09,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2021-12-22 02:42:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:09,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:09,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175921797] [2021-12-22 02:42:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175921797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:09,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:09,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 02:42:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239450259] [2021-12-22 02:42:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 02:42:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 02:42:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 02:42:09,516 INFO L87 Difference]: Start difference. First operand 272 states and 314 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:10,574 INFO L93 Difference]: Finished difference Result 270 states and 310 transitions. [2021-12-22 02:42:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 02:42:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-22 02:42:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:10,577 INFO L225 Difference]: With dead ends: 270 [2021-12-22 02:42:10,577 INFO L226 Difference]: Without dead ends: 270 [2021-12-22 02:42:10,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 02:42:10,578 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 236 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:10,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1002 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 02:42:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-22 02:42:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-22 02:42:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 198 states have (on average 1.5454545454545454) internal successors, (306), 266 states have internal predecessors, (306), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-12-22 02:42:10,583 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 62 [2021-12-22 02:42:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:10,584 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-12-22 02:42:10,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-12-22 02:42:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 02:42:10,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:10,585 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:10,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -278071787, now seen corresponding path program 1 times [2021-12-22 02:42:10,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:10,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29458022] [2021-12-22 02:42:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:10,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:10,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:10,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 02:42:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 02:42:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:11,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 02:42:11,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:11,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:11,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:11,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-22 02:42:11,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:11,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-22 02:42:11,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-12-22 02:42:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:11,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:11,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29458022] [2021-12-22 02:42:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29458022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:11,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:11,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 02:42:11,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280985137] [2021-12-22 02:42:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:11,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 02:42:11,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 02:42:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:11,642 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:12,882 INFO L93 Difference]: Finished difference Result 269 states and 308 transitions. [2021-12-22 02:42:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 02:42:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-22 02:42:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:12,884 INFO L225 Difference]: With dead ends: 269 [2021-12-22 02:42:12,884 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 02:42:12,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:12,885 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 233 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:12,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 836 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 02:42:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 02:42:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-22 02:42:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 198 states have (on average 1.5353535353535352) internal successors, (304), 265 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2021-12-22 02:42:12,890 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 62 [2021-12-22 02:42:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2021-12-22 02:42:12,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2021-12-22 02:42:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 02:42:12,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:12,892 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:12,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-22 02:42:13,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:13,103 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -450354753, now seen corresponding path program 1 times [2021-12-22 02:42:13,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:13,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628970369] [2021-12-22 02:42:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:13,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:13,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:13,106 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:13,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 02:42:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 02:42:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:13,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 02:42:13,712 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 02:42:13,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 02:42:13,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:13,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:13,962 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:13,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:14,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:14,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:14,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628970369] [2021-12-22 02:42:14,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628970369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:14,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:14,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:14,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747089485] [2021-12-22 02:42:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:14,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:14,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:14,083 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:15,066 INFO L93 Difference]: Finished difference Result 290 states and 330 transitions. [2021-12-22 02:42:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 02:42:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-22 02:42:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:15,068 INFO L225 Difference]: With dead ends: 290 [2021-12-22 02:42:15,068 INFO L226 Difference]: Without dead ends: 290 [2021-12-22 02:42:15,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-22 02:42:15,070 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 457 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 668 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 273 Invalid, 0 Unknown, 91 Unchecked, 0.8s Time] [2021-12-22 02:42:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-22 02:42:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 278. [2021-12-22 02:42:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 207 states have (on average 1.541062801932367) internal successors, (319), 274 states have internal predecessors, (319), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 323 transitions. [2021-12-22 02:42:15,077 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 323 transitions. Word has length 66 [2021-12-22 02:42:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 323 transitions. [2021-12-22 02:42:15,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 323 transitions. [2021-12-22 02:42:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 02:42:15,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:15,078 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:15,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:15,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,293 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -450354752, now seen corresponding path program 1 times [2021-12-22 02:42:15,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:15,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541640441] [2021-12-22 02:42:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:15,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:15,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:15,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 02:42:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 02:42:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 02:42:15,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:15,986 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:15,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:16,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:16,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:16,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:16,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:16,352 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:16,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-22 02:42:16,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-22 02:42:16,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:16,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-22 02:42:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:16,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:16,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541640441] [2021-12-22 02:42:16,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541640441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:16,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:16,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 02:42:16,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294395604] [2021-12-22 02:42:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:16,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 02:42:16,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 02:42:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:16,517 INFO L87 Difference]: Start difference. First operand 278 states and 323 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:18,286 INFO L93 Difference]: Finished difference Result 290 states and 327 transitions. [2021-12-22 02:42:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 02:42:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-22 02:42:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:18,288 INFO L225 Difference]: With dead ends: 290 [2021-12-22 02:42:18,288 INFO L226 Difference]: Without dead ends: 290 [2021-12-22 02:42:18,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-22 02:42:18,289 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 476 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:18,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 694 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 02:42:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-22 02:42:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 278. [2021-12-22 02:42:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 207 states have (on average 1.5217391304347827) internal successors, (315), 274 states have internal predecessors, (315), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 02:42:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 319 transitions. [2021-12-22 02:42:18,295 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 319 transitions. Word has length 66 [2021-12-22 02:42:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:18,295 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 319 transitions. [2021-12-22 02:42:18,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 319 transitions. [2021-12-22 02:42:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 02:42:18,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:18,296 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:18,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-22 02:42:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:18,503 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 88 more)] === [2021-12-22 02:42:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1408765628, now seen corresponding path program 1 times [2021-12-22 02:42:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3235687] [2021-12-22 02:42:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:18,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:18,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 02:42:18,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 02:42:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 02:42:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:19,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-22 02:42:19,280 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 02:42:19,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 02:42:19,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:19,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:19,519 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:19,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:19,623 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:19,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:19,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-22 02:42:19,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:42:19,888 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1318 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem128#1.base| v_ArrVal_1318) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (_ bv1 1))) is different from false [2021-12-22 02:42:19,909 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1318 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse0 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1318) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2021-12-22 02:42:19,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1318 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1317 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem126#1.base| v_ArrVal_1317))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1318)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:19,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1318 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1317 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1317))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1318)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:20,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1316 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1318 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1317 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1316))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1317)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1318)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:20,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 02:42:20,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 76 [2021-12-22 02:42:20,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4375 treesize of output 3232 [2021-12-22 02:42:20,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3228 treesize of output 2682 [2021-12-22 02:42:20,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2682 treesize of output 2626 [2021-12-22 02:42:20,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2626 treesize of output 2094